The prime(n)-th upper twin prime.

Terms

a(0) =7a(1) =13a(2) =31a(3) =61a(4) =139a(5) =181a(6) =241a(7) =283a(8) =433a(9) =643a(10) =811a(11) =1033a(12) =1153a(13) =1279a(14) =1429a(15) =1669a(16) =1933a(17) =1999a(18) =2143a(19) =2341a(20) =2551a(21) =2791a(22) =3121a(23) =3361a(24) =3583a(25) =3853a(26) =3931a(27) =4093a(28) =4159a(29) =4261